Finding the Fourth Proportional to 139,114.50, 208,500.71 and 64,130.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,114.50 : 208,500.71 = 64,130.64 : x
2. Step 2: Convert to fraction form
   139,114.50/208,500.71 = 64,130.64/x
3. Step 3: Cross multiply
   139,114.50x = 208,500.71 × 64,130.64
4. Step 4: Simplify right side
   139,114.50x = 13,371,283,652.10
5. Step 5: Solve for x
   x = 13,371,283,652.10/139,114.50
6. Step 6: Final answer
   x = 96,117.11